#ifndef _LIBPS2_H
#define _LIBPS2_H

#define PS2_CMD_GETID		0x02f2
#define PS2_CMD_RESET_BAT	0x02ff

#define PS2_RET_BAT		0xaa
#define PS2_RET_ID		0x00
#define PS2_RET_ACK		0xfa
#define PS2_RET_NAK		0xfe

#define PS2_FLAG_ACK		1	/* Waiting for ACK/NAK */
#define PS2_FLAG_CMD		2	/* Waiting for command to finish */
#define PS2_FLAG_CMD1		4	/* Waiting for the first byte of command response */
#define PS2_FLAG_WAITID		8	/* Command execiting is GET ID */

struct ps2dev {
	/* Ensures that only one command is executing at a time */
	mutex_t cmd_sem;

	/* Used to signal completion from interrupt handler */
	struct {
		mutex_t mutex;
		tid_t tid;
	} wait;

	unsigned long flags;
	unsigned char cmdbuf[6];
	unsigned char cmdcnt;
	unsigned char nak;
	
	int_mutex_t serio;
};

void ps2_init(struct ps2dev *ps2dev);
int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
void ps2_cmd_aborted(struct ps2dev *ps2dev);

#endif /* _LIBPS2_H */
